Implements Backward Digit Span task #5
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Basically, what I do is:
BackwardDigitSpanclass that extendsWordDigitSpanWordDigitSpanpublic (I could have made them protected, but I didn't care much about modularity)backward_digit_span.xmlfile that is almost identical todefault_digit_span.xml(but refers toBackwardDigitSpaninstead).I know this could have been made much more cleanly and nicely. I don't know how much you care about the cleanliness now (I have to say I am doing this in a rush, but I can take my time in the future and clean if you would like me to =) ).